Antislipping attachment for ladders



C. J. BROWN.

ANTISLIPPING ATTACHMENT FOR LADDERS.

APPLICATION FILED SEPT.8 I919.

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By his flTTORJVEIZ- iwm , CHARLES J. Bnown, or nrvnn rALLs'wIsconsm.

' ANTISLIPPING ATTACHMENT FOR LADDERS.

Specification of Letters Patent.

' Application filed September 5,1919, Serial No. 322,577. i

To all whom timely concern:

- Be it known that I, CHARLES J. BROWN, a

citizen of the United States, residing at. River Falls, in the county of St. Croix and State of Wisconsin, have invented a new and useful Antislipping Attachment for Lad-.

ders, of which the tion; V I

This invention relates to ladders, and the object is to provide the lower end of the ladder with improved anti-skidding'm'eans.

In the accompanying drawing, Figure 1 is a side elevation of the lower portion of the following is a specificaladder equipped-with my invention. Fig. 2

is a righthand edge view of Fig. 1 with the rubber tip and bushing removed. Fig. 3 is an enlarged section on the line 3-3 in Fig. 1. Fig. 4 is a detail side view of one of the metallic bushings used in the rubbertips of the device. Fig. 5 is a modification of the bushing shown in Fig. 4.

Referring to the drawing by reference numerals, 6 designates the rails and7 the rungs of the ladder of any description towhich my improvements may be applied. Upon the lower end of each rail is fitted a metallic socket 8 which is secured by a rivet 9 passed through the longer tongues 8 of'the bracket, while shorter tongues 8", are not riveted but serve to hold the wooden rail firmly upon the base of the socket, as do also the tongues 8. The socket is formed with and partly of said tongues, not only with the purpose in view already'mentioned but also to save material, save labor in the molding, as no core is needed as in molding a pocket-shaped socket, and to facilitate the fitting of the socket onto the wood; the socket being namely cast of malleable iron with the tongues slightly spread and after the socket is placed on the wood the tongues are bent or clenched close to the Wood.

Secured in the depending central portion, 8 of each socket is a spur 10, having screw threads 11, a part of which may be either screwed or molded into the casting 8, and part of it serves to hold a bushing12 threaded upon it. r

I Said ibushing is provided with external corrugations 13 upon which is tightly fitted a rubber socket or tip 14. The upper end of Patented Feb. 24, 1920.

the bushing is provided with a groove 15 for a wire ring 16 which by a chain 17 is connected to a staple 18. In the modification shown in Fig. 5 the bushing has a thread or spiral rib 19 instead of the corrugations 13 and may retain the ring 16 by a plain collar 20 instead of the groove 15 in Fig. 4. As a view'is shown how eachbushing12 may be further modification it is shown in Fig. 1

screwed upon one of said studs and thus hold the rubber tip out of the way when it is not wanted, because the surface on which the ladder stands is such that'the sharp spurs 10 y will give better service.

Itwill thus be 'unders toodthat in the use of against doing injury or becoming damaged during storage and transportation of the ladder. p

The spurs may or may not have their upper ends formed with projections 27 to enter into the ends of the rails.

What I claim is: The combination with the rails of a ladder, of sockets secured on the lower ends.

thereof and having each a downwardly extending spur with screw threads about its base, a metal bushing, threaded upon said threads and a rubber cap secured about the;

bushings and covering its lower end.. In testimony whereof I afiix my signature.

CHARLES J. BROWN. 

